Therefore, it would be useful to have
an operative method to calculate these curvature corrections without having to explicitly consider constraint equations. In the AdS background, several worthwhile attempts to describe the dynamics of free higher-spin fields have been made in the literature [1]}, [2]}, [3]}, [4]}.
One approach displayed in Ref.  [5]} is to regard the curvature correction terms as belonging to a dynamical mass \(M^2_\ell \) , yielding an equation of the form
\(\left(\Box - \frac{M_\ell ^2}{L^2} \right) B_{\mu _1 ... \mu _\ell } = 0\) 
